Yet another wireless network not working

alright, i have 2 computers both on windows xp home, and i have a linksys router which is wired to computer a, and a linksys wireless card in computer b, both computers access the internet just fine. but, computer a can access the shared folders of computer b with no problem. computer b on the other hand, when i go to My networkplaces>>>entire network>>>microsoft windows network>>mshome>> computer a, i get an acces is denied contact the administrater type error. i have disabled all security, closed my firewall/virus scan...and it still doesnt workany suggestions...or are their any software like network magic, that take up little memory while running
thanks
-Alex

 

OK wow...i just found something interesting out...on computer a...i went to my network places and selected the folders that were being shared and i copeid them and then pasted them into computer b through the network...i can now use those links that i pasted to access thos folders on computer a from computer b....this is very interesting